{"term":{"id":"09138","title":"hydrodynamic voltammetry","longtitle":"IUPAC Gold Book - hydrodynamic voltammetry","doi":"10.1351\/goldbook.09138","code":"09138","status":"current","definitions":[{"id":1,"text":"Voltammetry with forced flow of the solution towards the electrode surface.","notes":{"1":"Mass transport of a redox species enhanced by convection in this way results in a greater electric current. Convective mass transfer occurs up to the diffusion-limiting layer, within which the mass transfer is controlled by diffusion. Electroactive substance depletion outside the diffusion layer is annulled by convective mass transfer, which results in steady-state sigmoidal wave-shaped current-potential curves.","2":"A linear potential scan, at sufficiently slow scan rates so as to ensure a steady state response, is usually applied.","3":"The forced flow can be accomplished by movement either of the solution (solution stirring, or channel flow), or of the electrode (electrode rotation or vibration)."},"exams":{"1":"Voltammetry at a rotating disc electrode (RDE): the limiting current is described by the Levich equation.","2":"Measurement in flowing systems with electrochemical detection (ED) (high performance liquid chromatography - ED, capillary zone electrophoresis - ED, flow injection analysis - ED)."},"links":[{"term":"Levich equation","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/09140"},{"term":"Voltammetry","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/09148"},{"term":"current-potential curves","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/09070"},{"term":"electrode","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/09060"},{"term":"rotating disc electrode","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/09124"}],"sources":["PAC, 2020, 92, 641. 'Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)' on page 673 (https:\/\/doi.org\/10.1515\/pac-2018-0109)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/09138\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/09138\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/09138\/plain"},"citation":"Citation: 'hydrodynamic voltammetry' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.09138","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-04-18T04:51:42+00:00"}}